Microsoft Windows 8 team has released a new Avatar Prop for US Xbox consumers. This new Avatar Prop is a Microsoft Surface device running Windows 8. When enabled with this prop, your avatar will enjoy music in tablet mode and shows attaching a detachable keyboard. It also demos the kickstand available at the back of the tablet. Overall, a nice marketing stuff from Windows unit to attract Xbox consumers.
I think Microsoft may enable this prop for users outside US soon. Download this exclusive Avatar prop from Windows 8 here.